<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>画板1.0</title>
    <style>
 
        canvas {
            display:block; 
            overflow: hidden
                 
      
        }
    </style>
</head>

<body>
    <canvas id="canvas"></canvas>
    </body>
<script src="canvas.js"></script>
</html>